setban: add RPCErrorCode

src/rpcnet.cpp

@@ -525,7 +525,7 @@ UniValue setban(const UniValue& params, bool fHelp)
     else if(strCommand == "remove")
     {
         if (!( isSubnet ? CNode::Unban(subNet) : CNode::Unban(netAddr) ))
-            throw JSONRPCError(RPC_CLIENT_NODE_ALREADY_ADDED, "Error: Unban failed");
+            throw JSONRPCError(RPC_MISC_ERROR, "Error: Unban failed");
     }
 
     return NullUniValue;

src/rpcprotocol.h

@@ -65,6 +65,7 @@ enum RPCErrorCode
     RPC_CLIENT_NODE_ALREADY_ADDED   = -23, //! Node is already added
     RPC_CLIENT_NODE_NOT_ADDED       = -24, //! Node has not been added before
     RPC_CLIENT_NODE_NOT_CONNECTED   = -29, //! Node to disconnect not found in connected nodes
+    RPC_CLIENT_INVALID_IP_OR_SUBNET = -30, //! Invalid IP/Subnet
 
     //! Wallet errors
     RPC_WALLET_ERROR                = -4,  //! Unspecified problem with wallet (key not found etc.)